Re: [RFC PATCH] USB: remove CONFIG_USB_DEVICEFS

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On Thu, 24 May 2012 23:55:16 +0800
Jeff Chua <jeff.chua.linux@xxxxxxxxx> wrote:

> On Thu, Apr 26, 2012 at 11:12 PM, Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > On Thu, Apr 26, 2012 at 11:06:45AM -0400, Alan Stern wrote:
> >> On Wed, 25 Apr 2012, Greg Kroah-Hartman wrote:
> >>
> >> > This option has been deprecated for many years now, and no userspace
> >> > tools use it anymore, so it should be safe to finally remove it.
> >> >
> >> > Reported-by: Kay Sievers <kay@xxxxxxxx>
> >> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> >> >
> >> > Anyone object to me queuing this up for the 3.5 kernel release?
> >>
> >> I'm not sure about this.  There are a few systems still floating around
> >> that don't use udev; on those systems /proc/bus/usb is the only way for
> >> user programs to control USB devices.  Admittedly, I have no idea
> >> whether any such systems will be using 3.5 or later kernels...
> >
> > They don't have to use udev, they can use devtmpfs (which is what the
> > majority of embedded systems use today), or they can just use static
> > device nodes to get access to these devices, the char node is still
> > present, we aren't getting rid of them at all.
> 
> Looks like vmware is breaking. Can't find any usb devices. I'm not using udev.

Perhaps a WARN_ON_ONCE would be safer for a bit ?
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